Remove check_uptodate.sh check from tox.ini

This removes the check_uptodate.sh test from the pep8 tox env. It
also syncs the sample config one last time to document some new
options available to users running with the newer oslo.messaging
versions.

Change-Id: I6107b996d5da808c3222696a9549ee06c22f80b9
Closes-bug: #1399085